The last two term president had a pretty good approval rating and that would be anything over 50% when compared to the current administration.

Let's see, the last two-term President did... nothing. He was blessed with the most unremarkable times to lead in (little in the way of wars, economic calamity, or natural disasters). The press loved and protected him in a way not seen since JFK.

The economy appeared to be strong (at least for the first 87 months of his term). And when the dot.com bubble burst, they were able to lay the blame elsewhere ("irrational exuberance", Enron) since employment was still high (thanks to the economic policies of Ronald Reagan). The only armed conflict we were involved in was in The Balkans, and the press kept agreeably quiet about it.

So his approval rating was high.

I'll offer that "approval ratings" are more a barometer of how people feel about things in general than a meaningful measure of a President. While I'll agree there's some correlation, remember "correlation does not equal causation".